International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Downy Brome (Cheatgrass) Globally
(Bromus tectorum)
Herbicide Resistant Downy Brome (Cheatgrass) Globally
(Bromus tectorum)
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Herbicide Resistant Downy Brome (Cheatgrass) Globally
(Bromus tectorum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 FranceFrance 1981 Corn (maize) atrazine 17 Photosystem II inhibitors (C1/5)
40Bromus tectorumDowny Brome (Cheatgrass)457
2 SpainSpain 1990 Wheat chlorotoluron 38 PSII inhibitor (Ureas and amides) (C2/7)
40Bromus tectorumDowny Brome (Cheatgrass)190
3 SpainSpain 1990 Orchards simazine 38 Photosystem II inhibitors (C1/5)
40Bromus tectorumDowny Brome (Cheatgrass)191
4 United States (Oregon) United StatesOregon1997 Kentucky bluegrass imazamox, primisulfuron-methyl, and sulfosulfuron 45 ALS inhibitors (B/2)
40Bromus tectorumDowny Brome (Cheatgrass)1112
5 United States (Oregon) United StatesOregon2005 Grass seed clethodim, fluazifop-P-butyl, quizalofop-P-ethyl, and sethoxydim 45 ACCase inhibitors (A/1)
40Bromus tectorumDowny Brome (Cheatgrass)5375
6 United States (Montana) United StatesMontana2016 Wheat imazamox, procarbazone-sodium, and pyroxsulam 45 ALS inhibitors (B/2)
40Bromus tectorumDowny Brome (Cheatgrass)15071
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, October 17, 2017 .  Available  www.weedscience.org
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